1 Department of Internal Medicine I - Cardiology, Angiology and Internal Intensive Care Medicine, RWTH Aachen University Hospital, Aachen, Germany.
2 CRS Clinical Research Services Mannheim GmbH, Mannheim, Germany.
3 Department of Internal Medicine IV, University Hospital Tübingen, Germany.
4 Institute for Diabetes Research and Metabolic Diseases (IDM) of the Helmholtz Center Munich at the University of Tübingen, German Center for Diabetes Research (DZD e. V.) Germany.
5 Department of Internal Medicine - Division of Cardiology, LKH University Hospital Graz, Medical University Graz, Austria.